PSG spent so much on Neymar it will have to sell players or risk getting booted out of the Champions League

Neymar. Getty Images Paris Saint-Germain splashed so much cash on former Barcelona forward Neymar that it "will have to boost revenues" or even offload other players to keep its place in the UEFA Champions League.

Daniel Geey, a sports lawyer for Sheridans, spoke to Business Insider about the potential impact Neymar's £200 million move could have.

The mega-deal could be a breach of UEFA's Financial Fair Play (FFP) rules, which are meant to stop clubs spending more than they earn.

If PSG is found not to be compliant with FFP, the club could be booted out of the Champions League.

Because of the huge amount the club spent on Neymar, it will have to boost its commercial revenue or reduce its costs significantly — potentially by letting go of other expensive players.

Geey said that star winger Ángel di María and central midfielder Blaise Matuidi are likely candidates if PSG takes the nuclear option to balance its books.

He told BI: "The club will have to boost revenues in some way. With sponsorship deals, UEFA will ensure the contract is a correct, or market, value.

"There can be more commercial deals made. But PSG may look to sell, for example, Ángel di María and Blaise Matuidi."

Ángel di María and Blaise Matuidi. Gonzalo Arroyo Moreno / Getty Images Such a strategy could be tempting, Geey explained, because PSG would not only save the money that would have gone on their wages, but can write off huge chunks of their original transfer fees.

As the fees are made for deals spanning multiple years, offloading players early means they can claim back the remaining part of their fee for each year they didn't stay at the club.

For example, getting rid of a player who cost a £50 million transfer fee after just two years means that £30 million of that value essentially went unused, and doesn't count towards the FFP limit.

Geey added that PSG will have to work hard to please UEFA, since it has already come under suspicion for a £167 million sponsorship deal from the Qatar Tourism Authority. As such "any sanction is likely to be on the harsher side," and could even go as far as expulsion from Europe's biggest football league.